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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – ADVANCED ZOOLOGY & BIOTECH.
THIRD SEMESTER – NOVEMBER 2011
AZ 3506/AZ
3506
3502 - ENVIRONMENTAL BIOLOGY
Date : 03-11-2011
Time : 9:00 - 12:00
Dept. No.
Max. : 100 Marks
PART – A
Answer ALL questions, each in a few words
(10 × 2 = 20 marks)
01. What is carrying capacity of a habitat?
02. Differentiate biotic from abiotic factors of an environment, with examples.
03. Define mutualism. Give an example.
04. Explain ecotone and edge effect.
05. Comment on global warming.
07. Draw a diagram to illustrate food chain.
08. Bring out the difference between
betw
aestivation and hibernation.
09. Briefly explain environmental degradation
de
and its effects.
10. Comment on ecotourism and its advantage.
PART B
Answer any FOUR questions, each in about two pages
(4 × 10 = 40 marks)
11. Explain the terms deforestation, reforestation and afforestation.
12. Discuss adaptations of animals
nimals to pelagic habitat.
13. Explain aestivation in animals.
14. What is antagonistic interaction between species?
15. Explain community stratification in forest ecosystem.
16. Write a brief note on space ecology.
PART C
Answer any TWO questions, each in about 4 pages
17. Give a detailed account of the attributes of animal population.
18. Describe nitrogen and carbon biogeochemical cycles.
19. Discuss energy flow, food chain and food web of ecosystem.
20. Write an essay on environmental pollution.
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(2 × 20 = 40 marks)